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Questions tagged [segregated-witness]

A 2017 softfork that introduced a new transaction format to fix third-party transaction malleability and increased the blocksize.

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Does segregated witness allow to securely create LN channel opening transactions?

In Rusty Russell's paper about the simplified version of the Lightning Network, some problems about the practical implementation of the opening channel method from the original LN paper are mentioned: ...
cpsola's user avatar
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4 votes
1 answer
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Does the bitcoin testnet3 network support Segwit and OP_CSV?

As far as I know, Segregated Witness and OP_CHECKSEQUENCEVERIFY are the last features needed to be able to fully implement a trustless bi-directional payment channel, from start to finish. (...
morsecoder's user avatar
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2 votes
0 answers
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When is the estimated date that segregated witness gets fully implemented worldwide?

I read the news recently that reviews had already been done and that the segregated witness program will be on deployment soon, so when is it expected to be fully adapted worldwide? Or is there a ...
Blue Deeper's user avatar
8 votes
1 answer
2k views

What is the precise definition of "witness program"?

BIP 141 uses the term "witness program" extensively without, apparently, adhering to a consistent definition. From the heading "Witness Program": A scriptPubKey (or redeemScript as defined in ...
Rich Apodaca's user avatar
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1 vote
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Can the first part of P2WSH witness data use non-push-data operations?

BIP 141 describes a new kind of authentication template called Pay-to-Witness-Script-Hash (P2WSH). This template moves challenge and response scripts to witness data. The last element of witness data ...
Rich Apodaca's user avatar
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4 votes
1 answer
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Does any current SegWit or blocksize increase proposal also seek an increase in the OP_RETURN byte limit?

Does any current SegWit or blocksize increase proposal also seek an increase in the OP_RETURN byte limit? https://en.bitcoin.it/wiki/OP_RETURN Are there any current pull requests that seek an ...
Game Changer's user avatar
12 votes
1 answer
2k views

How many more transactions per second will be possible with SegWit?

On a percentage basis compared to the current theoretical limit how many more transactions per second will be possible after SegWit? Will the answer to number 1 scale linearly with block size ...
prodigious's user avatar
4 votes
1 answer
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What is the status of the "Hong Kong Agreement"

Are the bullet points below still valid? We understand that SegWit continues to be developed actively as a soft-fork and is likely to proceed towards release over the next two months, as originally ...
guesswhoiam's user avatar
11 votes
3 answers
2k views

How to track Segregated Witness adoption rates

How can I find out what the current Segregated witness adoption rate is, so as to see how it is progressing towards the 95% readiness required for it to activate.
trampster's user avatar
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9 votes
3 answers
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How would I explain SegWit to a non-technical friend?

How can I explain the potential ease of scaling and feature benefits of Segregated Witness to a non technical friend? How can I explain the potential drawbacks of Segregated Witness in a non ...
cowboy4life's user avatar
7 votes
2 answers
371 views

segregated witness adoption

What happens if segregated witness never reaches the 95% adoption threshold from miners? Will it still take effect for those transactions where the miners have adopted it?
Luke Benton's user avatar
4 votes
1 answer
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A common criticism of Segregated Witness is that it is "unnecessarily complex". Why is it chosen over alternatives?

Segregated Witness (SegWit) is well-along the way to being implemented and deployed as a soft-fork. Facts: SegWit eliminates most forms of transaction malleability. Discounts input scripts in ...
Murch's user avatar
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6 votes
3 answers
318 views

If SegWit only increases the capacity to only 2-4x only. Wouldn't we have the same issue in a few years again?

If I understand correctly. SegWit is one of the solutions to the full 1MB block problem that doesn't require a hard fork. But I've read this only increases the 1MB to maybe about 2-4x only. If that is ...
Patoshi パトシ's user avatar
3 votes
1 answer
405 views

SegWit and SPV-mining. What if...?

Is the following scenario valid? Some unhonest segwit mining pool takes top-1000 segwit utxo and mines a block at height N with a transaction which transfers all funds to his p2pkh address This block ...
amaclin's user avatar
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10 votes
3 answers
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Why is the witness data fee discounted by a factor of four?

I've read that it encourages users to consolidate UTXO sets. How would it be doing that?
Murch's user avatar
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17 votes
2 answers
480 views

How thoroughly has Segregated Witness been tested?

I've encountered claims that Segregated Witness was "not really tested" and is being "rushed". It is my understanding that SegWit had been running on Elements for more than half a year already, and ...
Murch's user avatar
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5 votes
2 answers
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Can unupgraded nodes that accept zero confirmation be fooled after SegWit?

Considering the following scenario: After deployment of SegWit, there remain two old clients (with software that is unaware of SegWit) A & B. A funds a transaction to pay B using a SegWit ...
Murch's user avatar
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2 votes
1 answer
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Segregated witness soft fork: how is the funding Tx made "ANYONECANSPEND"

Reading the BIP: https://github.com/bitcoin/bips/blob/master/bip-0142.mediawiki I see that the scriptPubKey in a transaction that funds a segwit redemption is the same as a normal P2PKH but merely ...
pinhead's user avatar
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13 votes
1 answer
393 views

What are the segregated witness tradeoffs?

Segregated witnesses sound like a win in a lot of ways, I'm just trying to understand how they apply to scalability. If I understand correctly, there is a second Merkle tree of witnesses mirroring the ...
Steve Ellis's user avatar
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18 votes
1 answer
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What is "segregated witness" and how can it improve network scalability?

I've just heard about it, and it is claimed to be a "turning point" in the block-size debate. What is "segregated witness?" how does it work? How can it be used for improving network scalability? ...
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